<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title></title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script src="https://cdn.bootcdn.net/ajax/libs/vue-router/3.4.8/vue-router.min.js"></script>
</head>

<body>
    <div id='app'>
        <router-view></router-view>
        <router-view name="demo"></router-view>
    </div>
    <template id="index">
        <div>
            我是首页
        </div>
    </template>
    <script>
        let indexdemo = {
            template: "#index"
        }
    </script>

    <template id="demo">
        <div>
            我是明名试图
        </div>
    </template>
    <script>
        let demo = {
            template: "#demo"
        }
    </script>
    <script>
        let router = new VueRouter({
            routes: [
                {
                    path: "/",
                    redirect: "/index"
                },
                {
                    path: "/index",
                    components: {
                        default: indexdemo, 
                        demo: demo,
                    }
                }
            ]
        })
        const vm = new Vue({
            el: '#app',
            data: {
            },
            router
        })
    </script>
</body>

</html>